[harmony] Move some regression tests to the right place

test/mjsunit/regress/regress-crbug-465671.js

Index: test/mjsunit/regress/regress-crbug-465671.js
diff --git a/test/mjsunit/regress/regress-crbug-465671.js b/test/mjsunit/regress/regress-crbug-465671.js
deleted file mode 100644
index 24f4d054755bc241d87ad774787d595aad6c0657..0000000000000000000000000000000000000000
--- a/test/mjsunit/regress/regress-crbug-465671.js
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2015 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Flags: --harmony-arrow-functions
-
-// This used to trigger crash because of an unhandled stack overflow.
-function f() {
-  var a = [10];
-  try {
-    f();
-  } catch(e) {
-    a.map(v => v + 1);
-  }
-}
-f();